Fire-extinguishing means for boilers.



J. SHIERY.

FIRE EXTINGUISHING MEANS FOR BOILERS.

APPLICATION FILED 001229. 1914.

Patented Aug. 17, 1915.

A TTORNEY5.

INVENTOR John Shier COLUMBIA PLANOGRAPH c0 ASHINGTON D c JOHN SHIERY, OFBBIDGEPORT, ILLINOIS.

FIRE-EXTINGUISHING MEANS FOR BOILERS.

Specification of Letters Patent.

Patented Aug. 17, 1915.

Application filed October 28, 1914. Serial No. 869,342.

To all whom it may concern Be it known that I, JOHN SI-nnRY, residing atBridgeport, in the county of Lawrence and State of Illinois, haveinvented a new and Improved Fire-Extinguishing Means for Boilers, ofwhich the'following is a specification.

This invention has reference to that class of devices or meansattachable to steam boilers and adapted for extinguishing the boilerfire before the water within the boiler reaches a low or danger point,and my said invention has for its object to provide a means of thecharacter stated of a compact and economical construction, in which theseveral parts are so designed that they may be readily applied to thevarious construction of boilers and which effectively serve theirintended purpose.

iVith other objects in view, my invention embodies the peculiararrangement and combination of parts, all of which will be hereinafterfully explained, specifically pointed out in the appended claims, andillustrated in the accompanying drawing, in which:

Figure 1 is an end elevation of a boiler with my invention operativelycombined therewith. Fig. 2 is a vertical section taken on the line 22 onFig. 1, the controlling valve being shown at the closed or normalposition. Fig. 3 is a detail vertical section showing the parts at the.elevated or open position.

My improved attachments, which act as a safety device for boilers,consists primarily of a tapering casing 1, the upper or contracted endof which terminates in an opening 2, that is internally threaded toreceive the lower threaded end of an ex pansion pipe section or tube 3,the upper 'end of which threads into a cap piece 4: provided with atransverse or crown seat 40, the purpose of which will presently appear.

The lower end of the casing 1 is open and is internally threaded, as at20, to receive the threaded flange 50 of a removable bottom section 5,which includes a hollow pendent casing-like portion 51 that has athreaded outlet 52 to receive the upper end of an outflow pipe 6, thatjoins with the fuel. feed pipe 7 that conveys the gaseous fuel into theboiler at a suitable point below the door, as is indicated on Fig. 1, byreference to which it will be also seen the I fuel pipe has the usualcutoff valve 71 located beyond the outflow pipe connection 61. Thebottom section 51 has a central outlet 53 that also forms a valve seatfor the controlling or ball valve 8 and it also has a central pendentguide aperture 5% in which is slidably held a lifting rod or stem 9, theupper end of which terminates in a head 90, which, under normalconditions, is positioned a slight distance below thevalve 8, when thelatter is at the normal or closed position, indicated in full lines onFig. 2 of the drawing. The lower end of the lifting stem 9 rests upon anadjusting screw 10 that threads into a cross bar 11 supported on hangerrods 1:? that form a part of a yoke 12 pendently supported on the cappiece 4 and which engages the seat 40 thereof, as shown. Casing 1 has aninlet 15 that receives one end of a pipe connection 16, the other end ofwhich, as shown, joins with the lowermost one of the water gages 16 onthe boiler. 18 designates a control valve in the pipe connection 16. Thecap member 4: has a lateral extension 11 that carries a pet cock e2,(see Fig. 1).

13 is a packing gland for the lift rod that cooperates with thecontrolling or ball valve.

From the foregoing description taken in connection with the accompanyingdrawing, the operation and advantages of my invention will be readilyunderstood.

As the water in the boilerlowers to a point below the lower gage level,steam enters the casing and passes up into the pipe section or tube 3,the latter, by'reason of its expansiomlengthens andin doing so it liftsthe yoke member with the cross bar and thereby elevates the lift rodsufiiciently to cause it to engage and raise the valve 8 from its seatand thereby allows the water in the casing 1 and the steam back of it topass through the outflow pipe into the fuel pipe and thus extinguish thefire therein.

In practice, the pet cook 42 may be occasionally opened to clear theexpansion pipe or tube of dirt and scale and for relieving the pressureof steam when the valve in the pipe connection is closed, following thefire extinguishing operation, and thus permit the said expansion pipe ortube to quickly contract in order to allow valve 1 to drop back to itsclosed position to bring the parts ready for another operation.

My invention is particularly adapted for use on boilers in the oil fieldwork or at any place where gaseous fuel is used.

What I claim is:

1. In a safety device for boilers, the combination with the fuel supplypipe and the boiler; of a casing having an inlet and an outlet, a pipeconnection that joins the inlet with the boiler, an outflow pipe thatjoins the outlet with the fuel pipe, a valve within the casing thatnormally seats over and closes the casing outlet, an expansion tube thatconnects with the casing,a valve shifting element, and a connectionbetween the said shifting elementand the expansion tube for moving theshifting element to move the valve from the casing outlet as the saidtube expands.

2.. In a safety device for boilers, the combination with the fuel supplypipe and the boiler; of a casing having an inlet and an outlet, a pipeconnection that joins the inlet with the boiler, an outflow pipe thatjoins the outlet with the fuel pipe, a valve within the casing thatnormally seats over and closes the casing outlet, an expansion tube thatconnects with the casing a valve shifting element, a connection betweenthe said shifting element and the expansion tube for moving the shiftingelementto move the valve from the casing outlet as the said tubeexpands, a pet cock connected with the said tube for clearing it and acontrol valve in the pipe connection from the boiler to the casing.

3. In a safety device for boilers, the combination with the fuel supplypipe and the boiler; of a casing having an inlet at the upper end and anoutlet in the bottom thereof, a pipe connection that joins the inletwith the boiler, .an outflow pipe that con nects the outlet of thecasing with the fuel pipe, a ball valve within the casing that normallycloses the outlet thereof, an expansion tube connected to and extendingupwardly from the casing, a cap piece on the upper end of the tube, ayoke pendently supported from the said cap piece,.a cross bar hung onthe said yoke, and a lift rod supported by the bar and adapted to engageand lift the aforesaid valve as the yoke and the bar rise under theexpansion of the tube.

4. In a safety device for boilers, the combination with the fuel supplypipe and the boiler; of a casing having an inlet at the upper end and anoutlet in the bottom thereof, a pipe connection that joins the inletwith the boiler, an outflow pipe that connects the outlet of the casingwith the fuel pipe, a ball valve within the casing that normally closesthe outlet thereof, an expansion tube connected to and extendingupwardly fromrthe casing, a cap piece on the upper end of the tube, ayoke pendently supported from the said cap piece, a cross bar hung onthe said yoke, an adjustable support mounted on the cross bar and a liftrod mounted on the said adjustable support and adapted to engage andlift the aforesaid valve as the yoke and the bar rise under theexpansion of the tube.

5. In a safety devicefor boilers, a casing open at its upper and lowerends, a plug screwed intorthe lower end of said casing, said plug havinga passage provided with a web, said Web having. a valve seat, a ballvalve adapted to engage said seat, a packed pin adapted to engage saidball valve and projecting to the outside of said plug, an expansion tubescrewed into the upper opening of said casing, a member having a saddleportion on the upper end of said expansion tube, ayoke fitted over, saidsaddle portion, a cross bar carried bysaid yoke, and extending beneathsaid pin and an adjusting screw carried by said cross bar to engage withsaid pin, said casing at having an opening adapted to be connected withthe water space of a boiler and said plughaving a discharge outlet,substantially as shown and for the purposes described.

- JOHN SHIERY. Witnesses:

A. J. KAYLAR, E. C. CHANE Copies of this patent may be obtained for fivecents each, by addressing the Commissioner of Patents. Washington, D, C.

